On microstructure and corrosion behaviour of AlSi10Mg alloy with low surface roughness fabricated by direct metal laser sintering

被引：58
作者：
Fathi, P. [1 ]
Rafieazad, M. [1 ]
Duan, X. [1 ]
Mohammadi, M. [2 ]
Nasiri, A. M. [1 ]
机构：
[1] Mem Univ Newfoundland, Fac Engn & Appl Sci, St John, NF A1B 3X5, Canada
[2] Univ New Brunswick, MAMCE, Fredericton, NB E3B 5A3, Canada
来源：
CORROSION SCIENCE | 2019年 / 157卷
基金：
加拿大自然科学与工程研究理事会;
关键词：
Additive manufacturing (AM); Direct metal laser sintering (DMLS); AlSi10Mg; Surface roughness; Corrosion; Microstructure; A356; ALUMINUM-ALLOY; MECHANICAL-PROPERTIES; PITTING CORROSION; PROCESS PARAMETERS; ENERGY DENSITY; HEAT-TREATMENT; RESISTANCE; PRODUCTS; TEXTURE;
D O I：
10.1016/j.corsci.2019.05.032
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, in-depth microstructure and electrochemical properties of highly smoothed AlSi10Mg parts fabricated through direct-metal-laser-sintering are reported. The samples with the lowest surface roughness were characterized by having a periodic large and small melt pools (MPs) pattern in their upskin layers. Consequently, a noticeably coarser eutectic-Si network, Al-dendrite and grain size formed along the larger MPs' borders, rationalized by their slower solidification rate. Such microstructural features were found to control/deteriorate the electrochemical performance of the as-printed samples than their surface roughness. An improved electrochemical stability for the samples that experience the fastest solidification rate along their MP-boundaries was revealed.
引用
收藏
页码：126 / 145
页数：20
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